skill-tree:use:1:1:b
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| skill-tree:use:1:1:b [2021/02/08 18:39] – [Background] kunkel | skill-tree:use:1:1:b [2025/04/16 18:30] (current) – external edit 127.0.0.1 | ||
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| - | # USE1.1-B Command Line Interface | + | # USE1.1 Command Line Interface |
| - | # Background | + | |
| HPC systems are usually accessed via a Linux-based Command Line Interface (CLI) that is provided by a shell. | HPC systems are usually accessed via a Linux-based Command Line Interface (CLI) that is provided by a shell. | ||
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| The shell provides a textual interface allowing to interact with the operating system and performing all possible operations, i.e., accessing and manipulating files, and running programs. | The shell provides a textual interface allowing to interact with the operating system and performing all possible operations, i.e., accessing and manipulating files, and running programs. | ||
| However, there are various misconceptions that new users typically face when handling a shell such as the Bash. | However, there are various misconceptions that new users typically face when handling a shell such as the Bash. | ||
| + | Particularly, | ||
| - | Part of this skill is the general principles of the interaction with a shell. | + | Part of this skill is the general principles of the interaction with a shell, to execute and to stop programs. |
| + | ## Requirements | ||
| - | # Aim | ||
| - | * To describe the key principles of a shell. | ||
| - | * To execute basic programs to query system information and manipulate the system status. | ||
| + | ## Learning Outcomes | ||
| - | # Outcomes | + | * Utilize the bash shell to execute individual programs with arguments. |
| - | | + | * Describe the meaning of the exit code of a program. |
| - | * Describe the meaning of the exit code of a program. | + | * Run multiple programs after another depending on the exit code ;, &&, ||. |
| - | * Run multiple programs after another depending on the exit code ;, &&, ||. | + | * List the set of basic programs and their tasks: |
| - | * List the set of basic programs and their tasks: | + | |
| * pwd | * pwd | ||
| * whoami | * whoami | ||
| Line 27: | Line 26: | ||
| * clear | * clear | ||
| * man | * man | ||
| + | * vi, vim, emacs, nano | ||
| * exit | * exit | ||
| - | | + | * Utilize the available help of a program (--help argument and the man pages). |
| - | * Interrupt or abort a program execution: | + | * Interrupt or abort a program execution: |
| * CTRL-C | * CTRL-C | ||
| * CTRL-Z | * CTRL-Z | ||
| * using kill -9 | * using kill -9 | ||
| - | | + | * Use the shell history to search and execute previously executed commands. |
| - | * Set and print shell variables. | + | * Set and print shell variables. |
| - | * Identify potential special characters that must be handled with care. | + | * Print all currently set variables |
| - | * Utilize escaping to ensure correct handling of arguments. | + | * Identify potential special characters that must be handled with care. |
| - | * Understand wildcard characters to select a group of files/ | + | * List strings that could refer to files/ |
| + | * Utilize escaping to ensure correct handling of arguments. | ||
| + | * Understand wildcard characters to select a group of files/ | ||
| * * | * * | ||
| - | * [,-] | + | |
| - | * Use text editors. | + | |
| + | * How to close popular command line text editors | ||
| + | * nano | ||
| + | * vi | ||
| + | * emacs | ||
| - | # Subskills | ||
| - | * [[skill-tree: | ||
skill-tree/use/1/1/b.1612805982.txt.gz · Last modified: 2021/02/08 18:39 by kunkel